Oil pan for internal combustion engine transmission unit

Abstract

The invention relates to an oil pan ( 6 ) for an internal combustion engine transmission unit ( 1 ) comprising an oil pan housing ( 7 ) and a carrier flange, by way of which the oil pan housing is to be connected to the transmission housing ( 5 ) of the transmission. The carrier flange ( 4 ) is affixed to the transmission housing ( 5 ), and is connected to the oil pan housing ( 7 ) via a detachable connecting unit, wherein the connecting unit can be released or locked for the assembly and disassembly of the oil pan housing between the oil pan housing ( 7 ) and the carrier flange ( 9 ) regardless of the disassembly of the carrier flange from the transmission housing.

1. An oil pan for an internal combustion engine transmission unit ( 1 ), comprising
 a two-part oil pan casing ( 7 ,  8 ), the oil pan casing including
 a top part ( 7 ) and 
 a bottom part ( 8 ), 
 
 wherein the oil pan casing ( 7 ,  8 ) parts are an injection-molded plastic material, a support device ( 9 ) by means of which the oil pan casing ( 7 ,  8 ) is to be connected to a transmission casing ( 5 ) of the transmission ( 4 ), 
 wherein characterized in that the support device is embodied as a support flange ( 9 ) that is connected to the transmission casing ( 5 ) of the transmission ( 4 ) and on which, by means of a releasable connecting device, the oil pan casing ( 7 ,  8 ) is secured, 
 wherein the connecting device between oil pan casing ( 7 ,  8 ) and support flange ( 9 ) is releasable and connectable for mounting and demounting of the oil pan casing ( 7 ,  8 ) independent of demounting of the support flange ( 9 ) from the transmission casing ( 5 ), 
 wherein the connecting device between oil pan casing ( 7 ,  8 ) and support flange ( 9 ) comprises bushings ( 11 ) and correlated bushing receptacles ( 12 ) that are to be brought into alignment and together form a screw-connection passages, 
 wherein the bushings ( 11 ) and the bushing receptacles ( 12 ) are mountably engaged with one another by a friction fit, the friction fit mountable engagement of the bushings between the oil pan casing and the support flange ( 9 ) producing a releasable mounted engagement of the oil pan casing ( 6 ,  7 ) onto the support flange ( 9 ), without the use of other screws or connecting devices. 
 
     
     
       2. The oil pan according to  claim 1 , wherein the support flange ( 9 ) is mountably attached additionally on the engine block ( 3 ). 
     
     
       3. The oil pan according to  claim 1 , wherein the support flange ( 9 ) is comprised of aluminum. 
     
     
       4. The oil pan according to  claim 1 , wherein the top part ( 7 ) and a bottom part ( 8 ) of the oil pan casing are welded to one another. 
     
     
       5. The oil pan according to one of the  claim 1 ,  2 ,  3  or  4 , wherein the oil pan casing ( 7 ,  8 ) is also attached immediately on the engine block ( 3 ). 
     
     
       6. The oil pan according to  claim 5 , wherein the top part ( 7 ) includes support sleeves ( 13 ) integrally cast into the top part, wherein the bottom part includes support sleeves ( 13   a ) integrally cast into the bottom part and connected to the sleeves ( 13 ) in the top part ( 7 ), wherein screws are introduced to screw-connect the oil pan casing ( 7 ,  8 ) to the engine block ( 3 ). 
     
     
       7. The oil pan according to  claim 6 , wherein the support sleeves ( 13 ) extend across the bottom part ( 7 ) and the top part ( 8 ) of the oil pan casing. 
     
     
       8. The oil pan according to  claim 1 , wherein the support flange ( 9 ) extends at least section-wise between the engine block ( 3 ) and the oil pan casing ( 7 ,  8 ), wherein the oil pan casing ( 7 ) includes a recessed step ( 10 ) between the oil pan casing ( 7 ) and the engine block ( 3 ),
 wherein the support flange ( 9 ) includes a laterally projecting section ( 9   a ) that is received into the recessed step ( 10 ) between the oil pan casing ( 7 ) and the engine block ( 3 ), thereby forming a smooth continuous topside of the oil pan casing ( 7 ), the smooth continuous top side connected to the engine block ( 3 ). 
 
     
     
       9. The oil pan according to  claim 8 , wherein:
 the top part ( 7 ) includes support sleeves ( 13 ) integrally cast into the top part, 
 the bottom part includes support sleeves ( 13   a ) integrally cast into the bottom part and connected to the sleeves ( 13 ) in the top part ( 7 ); 
 screws are introduced to screw-connect the oil pan casing ( 7 ,  8 ) to the engine block ( 3 ) 
 the support sleeves ( 13 ) extend across an entire height of the bottom part ( 7 ) and the top part ( 8 ) of the oil pan casing, enabling screw connection of the oil pan from below the engine block.